Basic I/O Units With Terminal Blocks; Interrupt Input Units; Cj-Series Basic I/O Units - Omron CJ2 CPU UNIT User Manual

3 Nomenclature and Functions
3-6

CJ-series Basic I/O Units

3-6-1

Basic I/O Units with Terminal Blocks

Part Names and Functions
Eight/sixteen-point Units (18-point Terminal Blocks)
Model number label
I/O indicators
Terminal block for
I/O wiring, 18P × 1
Note The CJ1W-OD202, CJ1W-OD204, and CJ1W-OD212 also have an ERR indicator for the load short-circuit
alarm.

Interrupt Input Units

Functions
Interrupt Input Units are used to execute interrupt programs on the rising or falling edge of an input
signal. When the specified interrupt input turns ON (or OFF), execution of the cyclic program in the
CPU Unit is interrupted and an I/O interrupt task (task number 100 to 131) is executed. When execu-
tion of the I/O interrupt task has been completed, the cyclic program is again executed starting from
the instruction after which it was interrupted.
Interrupt Input Unit
Input
(rising or
falling
edge)
3-28
Connector
Connect to the connector on the next Unit.
ERR
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
1 cyclic task
MSKS
Immediate
interrupt
CPU Unit
I/O interrupt task is
executed when the input
turns ON (or OFF).
I/O interrupt task
CJ2 CPU Unit Hardware User's Manual